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Re: Ambiguity of DER encoding of UTCTime

1998-08-13 14:21:26
-----Original Message-----
From: Bancroft Scott <baos(_at_)oss(_dot_)com>
To: Darren Harter <Darren(_dot_)Harter(_at_)bcs(_dot_)org(_dot_)uk>
Cc: ietf-smime(_at_)imc(_dot_)org <ietf-smime(_at_)imc(_dot_)org>
Date: Thursday, August 13, 1998 07:04
Subject: Re: Ambiguity of DER encoding of UTCTime

A technical corrigendum to X.690 that addresses this matter was issued two
or three years ago.  The 1997 version of X.690 incorporates it:

11.8    UTCTime

11.8.1  The encoding shall terminate with "Z", as described in the ITU-T
X.680 |
       ISO/IEC 8824-1 clause on UTCTime.

11.8.2  The seconds element shall always be present.

11.8.3  Midnight (GMT) shall be represented in the form:


       where "YYMMDD" represents the day following the midnight in

11.8.4  Examples of valid representations




11.8.5  Examples of invalid representations

           "920520240000Z"         (midnight represented incorrectly)

           "9207221321Z"           (seconds of 00 omitted)

Bancroft Scott                                Toll Free    :1-888-OSS-ASN1
Open Systems Solutions, Inc.                  International:1-609-987-9073
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I presumed the matter would have been addressed by the standards community -
thanks for the confirmation.


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